Right-click the filtered object in the grid and select Filter then Remove.
OR
Double-click the object in view explorer to open its Properties window. For levels, select None from the Filter drop-down list. For measure items, select the blank option from the Filter drop-down list. For a row or columns axis, click the "X" button next to the Axis Filter field.
Right-click any filtered object in the grid (measure item, level, axis), and select Filter then Remove All.